Process for mounting inductances



Feb. 15, 1927.

H. GERNSBACK PROCESS FOR MOUNTING INDUCTANCBS Filed March 10. 1925 v 2 sheets-sheet 1 uuuuuuuuHHI-HJLJ Feb. 15, 1-927;

1,618,002 H; GERNSBACK PROCESS FOR MOUNTING INDUCTANCES Filed March 10. 1925 2 Sheets-Shoot 2 way 8% I 61mm,

gnuen iop Patented F 15, Q27.

' UNITED STATES J 1,618,002 PATENT OFFICE.

HUGO GEBNSBACK, OF NEW YORK, N.- Y.

PROCESS FOR MOUNTING INDUGTANCES.

Application filed March 10, 1925.

This invention appertains to electrical apparatus and more particularly to the mounting of coils, such as used for inductances and the like in the radio art.

Many experiments have been instituted toward the end of finding an efiicient mounting for inductances for radio work, The result of such work up to-the present invention has been more or less unsatisfactory. At the present time inductances are usually mounted by some mechanical means. In the case of abasket wound coil, for instance it is possible only to attach the same to condensers or other electrical instruments byrunning pegs through some of the holes. This gives rise to capacity eflect. Furthermore, the mechanical structure of the completed article is poor and the coils invariably work loose.

It is therefore a prime object of the present invention to provide a novel means and method for connecting the inductances with a suitable base or mountin which will be absolutely rigid with practically no mechanical imperfection and without radio frequency losses. .u

Another object of the invention is to provide a novel means for mounting a coil on a base, whichwill give a neat appearance and which will be cheaper than mechanical mountings that are now in vogue.

Another object of the invention is the provision of a novel method of incorporating a. coil directly in a bar or base plate of celluloid or the like, whereby the coil will form a direct part of the base plate without the necessity of employing extraneous means for connecting the coil to the base plate.

Another object of the invention is the provision of a novel method ofmounting an inductance coil which embodies means for softening or dissolving a part of a celluloid or similar base plate and pressing the coil into the softened part of the base plate and allowing the softened part of the celluloid to flow about a portion of the coil which is pressed into the same.

With thete and other objects in view, the invention consists in the novel construction,

1 arrangement and formation of parts, as will be hereinafter more specifically described,

claimed and illustrated in the accompanying drawings, in which drawings:

Figure '1 is a side elevation of a coil mounted in' accordance with this invention,

a front elevation of the same,

Serial No. 14,545.

-Figure 3 is a fragmentary lan view of the bar or base plate showing t e outer coils of a convolution of an inductance embedded therein,

Figure 4 is a longitudinal section through the base plate or mounting taken on the line H of Figure 3 showing the position of the coil in the base plate after the inductance has been incorporated therewith,-

Figure 5 is a transverse section through the base or mounting taken on the line 55 of Figure 4,

Figure 6 is a side elevation of another type of induction showing the same incorporated with the mounting in accordance with this invention, I

Figure 7 is a plan view of the same,

Figure 8 is a detail section taken on the line 8-8 of Figure 6,

Figure 9 is an edge elevation of the coil and mounting,

Figure 10 is'a fragmentary side elevation of the mounting showing the coil broken away.

Referring to the drawings in detail, wherein similar reference characters designate corresponding parts throughout the several views, the letter A generally indicates the mounting of an inductance coilB of the annular ty e. The means of mounting this type of cod is clearly shown in Figures 1 to 5 inclusive of the drawing.

In accordanre with the invention, a flat bar or base plate 10 of celluloid is used and this plate or bar can be provided adacent to its terminals with suitable openlugs for reception of fastening elements whereby the same can be readily secured to a support. The upper face of the bar at the central portion thereof is treated with a suitable solvent agent, which can be applied by the use of abrush or the like. A SlllfiClBIll] amount. of the solvent agent is applied until the face of the bar becomes soft or 1s reduced to the original consistency. The 0011 B is now placed transversely of the bar and pressed firmly into the softened portionof the celluloid until the celluloid covers the outer turns of the wire, as indicated by the reference character 11. The mounting is left for about six hours, after which the weld will have been completed and the wire convolution will be found to be embedded directly into the celluloid itself to the extent of about twenty thousandths of an inch. After. the weld is thoroughly dry the coil and the-celluloid bar becomes practically one and it is im ossible to pull the two apart without eit er de straying part of the bar or destroying the coil itself or the insulation.

In lieu of thesolvent agent, I can 'use a thick celluloid cement which contains a solvent agent having the property of dissolving part of the celluloid bar. This cement is. applied in the same manner as the solvent agent and when the bar is soft the coil is ressed on to the wet cement and left to ry. In about the same length of time, six hours, the weld has been completed in such a manner that a celluloid cement has squeezed right over the wires of the coil and the wire convolutions have embedded themselves into the celluloid.

In Figures 6 to 10 inclusive is illustrated a means of mounting an inductance of the flat type, the inductance being generally indicated by the reference character C.

In this type of mounting, a celluloid bar 15 is utilized and the solvent agent, or the celluloid cement is applied to the outer face of the bar until the celluloid has become soft, after which one face of the flat inductance is pressed into the same.

As shown in Figure 9 of the drawing, the coil is pressed into the bar only a sufficient distance as to permit the wire convolutions to be artiall embedded therein and-it has been ound t at after the celluloid has set, a ri 'd mounting will be had in this manner.

hile it is preferred to use a celluloid bar, as such a bar has been found to give the best results, bars of other composition can be utilized, such as hard rubber, and a rubber solvent agent such as rubber cement can be utilized instead of the celluloid cement.

From the foregoing description, it can be seen that I have provided a novel method of mounting inductanc'es, which will eliminate the trouble incident to coil mountin heretobefore experienced and which wil provide a rigid and mechanically perfect mounting.

Changes in details may be made without departing from the spirit and scope of this invention, but:

What I claim as new is:

1. The method ofmounting inductances, which consists in first providing a bar of suitable material, treating one face of the bar with a dissolvent agent until the portion of the bar so treated has become soft, pressing the wires of the inductance into the softened part of the bar and subsequently allowing the bar to set.

2; The method of mounting inductances which consists in first providing a celluloid plate, treating a portion of said plate with a dissolvent agent until the portion so treated becomes soft, pressing the inductance into the softened part of the plate until the said softened part flows over the coils thereof, and subsequently allowing the soft part to set.

In testimony whereof I aflix my signature.

HUGO GERNSBACK. 

